Gee, when you are off sick, you can find time to blog. Isn't that great? But I still hurt and now I'm getting a cold to boot. Oh well.
As I sat here today wallowing in self pity I needed to wind shuttles CTM (continuous thread method). Winding the first shuttle is easy. I just put the thread thru the hole in the bobbin, wind a few turns, then let my sidewinder take over. Now I need to wind the second shuttle. Problem: I have to cut the thread off the ball to do this. How much thread do I need? I thought I had seen something on this online so I did a search. I found one report on Bella from Georgia Seitz, but not exactly what I needed.
The solution is obvious, so I took the same size thread, put it on the sidewinder, let it wind, then I measured how much I unwound. The result is the chart I am putting under Experiments on the right side of the web page. So far, I have listed the six sizes I use with Aero bobbins. This is for my Pop-A-Bobbin shuttles, of course, but should be good for any that use this bobbin.
The photo shows how much i am putting on the bobbin. I don't want to overfill. The measurements I am listing are approximate. I marked off 36 inches (914mm) and just pulled it off and held it against it. I am probably off a few inches, but this works out close enough.
I will update this to accommodate other shuttles in the future. I do have the Clover bobbin shuttles so I will try those. I will also wind the std size Clover and the larger size Clover, the SewMate, and others that I have in my collection. I do not think I will do the Tatsy. That thing would mean unwinding balls of thread.